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Dictionary

a'trioventric'ular bun'dle

Anat.
a bundle of specialized muscle fibers regulating the heartbeat by conducting impulses from the right atrium to the ventricles. Also called bundle of His.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

atrioventricular

atrioventricular node

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